Merge Cube: Puzzle Game is an iPhone game developed by Tether Studios LLC. It is a free puzzle game that challenges players to combine tiles to make new ones. The objective is to see how high you can go in creating higher-ranked tiles.

The game includes tournaments and head-to-head competitions with real-world prizes (where available). Players can compete against others in multiplayer tournaments or play head-to-head matches. In each match, all players receive the same board, and the player with the most points wins.

Merge Cube: Puzzle Game also offers the option to challenge players around the world using Skillz, a competition platform with leaderboards, trophies, and physical or virtual prizes. Additionally, the game features a loyalty program that rewards players for playing.

Please note that prize tournaments are not available in certain states: AR, CT, DE, LA, and SD. However, players from these regions can still enjoy the game and play for fun using the virtual currency.

Overall, Merge Cube: Puzzle Game provides an engaging puzzle experience where players can test their skills and compete for rewards.